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Process Equipment and Plant Design

Process Equipment and Plant Design
In a thin cylindrical shell, the hoop stress is __________ stress.

Longitudinal
Radial
Compressive
Circumferential tensile

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Process Equipment and Plant Design
In case of plain carbon steel, butt welded joints are used for shell plate thickness ≤ __________ cms. .

0.5
1.2
3.8
6.8

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Process Equipment and Plant Design
For a 25 mm hole drilled in plates to be rivetted, the shank diameter of the rivet should be __________ mm.

23
26
25
27

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Process Equipment and Plant Design
Le/D for a Tee (used as elbow, entering branch) would be

Both B and C
More than that for Tee (used as elbow, entering run)
Less than that for Tee (used as elbow, entering run)
Around 90

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Process Equipment and Plant Design
For a cylinderical vessel of moderate height, the weld joint efficiency for joints parallel to the cylinderical axis is given as 1.0, while for joints along the girth (circumference) it is given as 0.8. In calculating the shell wall thickness using code formula for an internally pressurised cylinderical vessel, what value of weld joint efficiency should be used?

(0.8)0.5
0.8
0.9
1

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Process Equipment and Plant Design
Low pressure steam (with saturation temperature between 105 to 120°C) is usually used in the vacuum evaporators, which normally employ a vacuum of about __________ mm Hg (referred to a 760 mm mercury barometer).

650
250
750
450

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